export CROSS_COMPILE=/home/zhaofujin/d1/toolchain-thead-glibc/riscv64-glibc-gcc-thead_20200702/bin/riscv64-unknown-linux-gnu-  PLATFORM_RISCV_ISA=rv64gcxthead FW_JUMP_ADDR=0x40200000 FW_TEXT_START=0x40000000
